A display device mountable on an automotive wiper arm positioned on the rear of an automotive vehicle, comprising a display panel having a front side for presentation of text or graphics and a back side for mounting a connector; an arm-connector for affixing said display device to said automotive wiper arm; a shaft for linking said arm-connector to said display panel; a shaft-connector for affixing said shaft to said display panel, said shaft-connector comprising part of said shaft; a display-connector for affixing said shaft to said display panel, said display-connector comprising said connector positioned on said display panel backside; wherein said shaft-connector and said display-connector are configured to lock together after one is connected to the other, substantially preventing separation of said display panel from said shaft during motion of said automotive wiper arm during operation, and wherein said arm-connector is configured to clasp said automotive wiper arm and maintain sufficient pressure to avoid substantial rotation of said shaft around said automotive wiper arm as a result of airflow pressure on said display panel during vehicular motion.